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Note 11 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Computed tax at expected statutory rate | $ (3,025,369) | $ (2,349,899)
State and local income taxes, net of federal benefit | (1,532) | (1,387)
Non-US income taxed at different rates | (138,596) | (101,856)
Deferred compensation | 52,500 | (31,500)
Non-deductible expenses | 2,749 | 1,565
Non-taxable income | (541) | 0
Change in valuation allowance | 3,035,205 | 2,209,294
Other | (161,826) | 210,747
Total tax expense (benefit) | $ (237,410) | $ (63,036)

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deferred compensation. + References No definition available. + Details
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